1Meister GC,Angelo RD,Owen M,et al.A comparison of epidural analgesia with 0. 125% ropivacaine with fentanil versus 0. 125%bupivacain with fentanyl during labor[].Anesthesia and Analgesia.2000
2Gaiser RR,Venkateswaren P,Cheek TG,et al.Comparison of 0.25 % ropivacaine and bupivacaine for epidural analgesia for labor and vaginal delivery[].Journal of Clinical Anesthesia.1997
3Fischer C,Blanie P,Jaouen E,et al.Ropivacaine, 0. 1%, plus sufentanil, 0. 5μg ml versus bupivacaine, 0. 1% , plus sufentanil 0. 5μg ml, using patient-controlled epidural analgersia for labor: a double-blind comparison[].Anesthesiology.2000
4Campbell DC,Zwack R M,Crone LL,et al.Ambulatory labor epidural analgesia: bupivacaine versus ropivacaine[].Anesthesia and Analgesia.2000
5Macarthur A,Macarthur C,Weeks S,et al.Epidural anaesthesia and low back pain after delivery: a prospective cohort study[].British Medical Journal.1995